Performance seem's to be depending of the number of face

[ewok2]

Hello
I have send some time to find a tunning that works for me (I have 2 son that look like each oter...)
Know I am spend more time to label all the faces that are not part of a cluster.
And I have the filling the more face I tag the more the speed of the app decrease....
It took know almost 30 sec to display the main page of my 111 faces of my tag faces. with few faces it goes more faster.
My server has no trouble to manage mail, plex, NC and other service.....

It llok like each time I go to this main face pages it recompute a lot of things even if I did not change anything...

Is there a way to increase the speed? (Change the database used? some other NC tunning?

For some more detail the "stats" of the app :
| User | Images | Processed | Faces | Clusters | Persons |
+----------------+--------+-----------+-------+----------+---------+
| me | 25601 | 25601 | 30972 | 24575 | 111 |

Thanks